85/626 fuel problems
 

I posted on the 13th about a 626 with fuel coming out the vapor canister. the fuel tankhttp://images.intellitxt.com/ast/adTypes/2_bing.gif has positive pressure when u open cap. what would cause positive pressure....and where do I start looking?
thinking about replacing cap as a start, Hate to throw parts at it without some guidelines.
What does the evap purge solenoid do and where is it located?
There have been 45 views to my post - no replies.
Please help.
Thanks, Ron Dupree